Lighting fixture



March 24. 1925.

H. A. FRAMBURG LIGHTING FIXTURE bury i ngejgor. Henry va Original FiledApril 30, 1921 Patented litten del? laila narran STATES naaste PATENTOFFICE.

HENRY A. FRAMB''RG, OF BERWYN, ILLINOIS.

LIGHTING FIXTURE.

Application filed April 30, 192.1, Serial 1\Tc-.` 465,779.y RenewedDecember, y1922.

To all whom t may conocer/'1.,'

Be it known that l, HENRY A. FruiMBnc-,-

a citizen of the United States, and resident of Berwyn, county of Cookand State of illinois, have invented certain new and useful Improvementsin Lighting Fixtures, of which the following is a specification7 andWhich are illustrated in the accompany ing' drawings, forming` a partthereof.

'Theinvention relates to .lighting fixtures and especially tochandeliers and Wall lixtures having` spaced bracket arms -which`project vertically `and outwardly troni a common support. rlhe objectof the invention is to provide alightinp; iirzture of such improvedconstruction as to facilitate t-he assembling oi" the parts andeffectively prevent relative angular displacement 'of the bracket armsin service.

ln the accompanying di'aivingsy-V Fig. 1 is a central vertical.sectional vienT ot` a chandelier embodying the features ofM improvementprovide-d by the invention,

some parts being shown in elevation;

Fig. 2 -is an inverted detail plan sectional view taken on the line 2-2of llig. 1; Fig. is a plan vievv showing a centering plate employed inthe construction ot the chandelier7 separated troni other parts;

l is similar to like: 3, butl shows a torni of centering' plate whichmay be used in the construction oit a Wall fixture;

Fig. 5 is a detail sectional vievv taken on the line 5 5 ot Fig. 2;

Fig. 6 is a plan view of the chandelier illustrated in Fig. 1, and fFig. 7 -is similar to Fig. 6, but shows the application of the inventionto the'con struction ont Fixture. 1

The body of the improved chandelier may be constructed in accordancewith the usual practice to produce the desired external appearance Asshovvnyiirllig. 1, the chandelier body is composed of a plurality ot'4-5 ornanientalsheet metal siells including the two mating'intermediateshells 15, 16, and all of these shells are arranged upon centralsupporting traine comprising,- asection of pipe 10, a rod 11. and acouplingA member 12, the last mentioned member having,` oppo sitelyfacing threaded sockets into which the threaded ends of the pipe 10" androd 11 are entered. rllhe said coupling 1neinber12 is preferably of `afamiliar' torni commonly used inthe construction of electric chandeliersand has lateral openings 13 vfor the delivery of the Wiring, as 1.4L,into the chamber of the chandelier body. i

In `the particular design ol' chandelier body selected'itorillustration, the shell 15 is formed to'provide an upwardly :facing fiatannular ledge 17, and the bracket arms, as 18, to which thel lamps (notshovvn)` are applied, spring from thisl ledge.` For this purposetheledge 17 is provided at intervals `with apertures, as 19, throughwhich the `threaded inner ends 2O ofthe bracket arms 18 are "entered,andl each bracket arm 1S is formed With an annular shoulder 21 adjacentits 'threaded'end for bearing upon the said'ledge` about thecorrespondingap-y. erture. l

While the application oit a clamping' nut, as `22, to the threaded innerlend 19 of each bracket'arni 18' directly under ythe ledge 17, wouldserve, in a: measure, to hold the bracket arms in place, the improvementpro vided by the invention not only insures the original location of the`bracket arms incorrect angular position but also effectively preventstheir subsequent displacenient? and `produces a anore rigidconstruction.- As shown, the threaded inner end 20 of each bracket armis formed `with a longitudinal slot 23, at one side,` and a stili'lsheet metal plate 24 having apertures 25 Yfor receiving` theinner'endsof thebracket arms and a tongue 26 at the margin of eachaperture 'for entering' the corresponding slot 23, rdirectly under-liesthe ledge 17 Within the chamber of the chandelier body'. lt follows thatit the` plate ,24 is firmly heldl against the undersideof the ledge 17with its apertures 25 in register with theapertures 19 of the ledge, theinner ends 2O of:

the bracketarms 18-can only be entered in the apertures 19 Whenthe armsare correct-ly positioned for the engagement of the tongues V26 vviththe corresponding slots 23. Y Likewise,ivlien clamping` nuts, as 22, areapplied to the Ythreaded ends of the bracket. arms 18 below the plate24, the parts will be lirinly held in* place and angular dis placementof the bracket arms is impossible.l Since the usual tapered form ot'pipethreadwill customarily be formed upon the inner ends 2() of the bracketarms 18, vthe application of the `clamping nuts 22vvill tend to compressthe walls of each bracket arm at the two sides of the slot 23, therebyfirmly gripping the tongue 26 and imparting increased rigidity to theconstruction.

When the chandelier is formed with the said central supporting frame,the plate 24 is preferably gripped at its center, as' between theadjacent end of the coupling member 12 and a nut 27 applied to the pipe10 over the plate. Under these circumstances the assembling of the partsvis facilitated and the position of the nut 27 upon the pipe 10 may berelied upon to determine the location of plate 24, if the plate isformed with anangular depression 28 for receiving the nut 2T andpreventing its rotation.

In assembling such a device, nuts 27 will first be screwed in place, theend of the threads on tube 1G limiting further movement. Pocket 28,which strengthens the plate against buckling, alsol prevents relativerotation of the plate and tube 10, and these parts are clamped into arigid unit by coupling 12. As arms 18 penetrate ledge 17 and plate 24,and fastening the arms in place clamps these two parts together, all theupper ornamental` shell structure, is ralso prevented from rotating withrespect to tube 10. rlChe top cap 34, therefore screws down intoabutment with a fixed and nonrotatable flange andis much less prone towork loose onthat account.

It will be apparent that while the thickness of the ornamental uppershell is insuflicient for it to stand alone, the stresses adjacent themountings for arms'18, which are carried primarily bythe heavier plate24, said shell `materially contributes to the rigidity of the entirestructure bybracing the edges of the plate to the pipe 10..

There is a decided advantage in the use of a stamping such ats-2% overcast, turned,

or milled parts. This is due, first to cheapness, but also to the muchhigher degree of uniformityv of product thus obtainable. For the trainedeye, the beauty and sym-` metry of such equipment is easily destroyed byerrors in alignment. vThese are automatically avoided even 1n quantityproduction by the structure shown.y Arms 18 are the plate.

' In applying the invention to the con..-

struction of a wall lixture, as 29, (Fig. 7),

a plate 8O (Fig. l) conforming in shape with the body of the fixtureland having apertures 31 equal in number to Ithe number of Vbracket arms32 of the fixture is used. The plate-30 will also be former with tongues33 at the margins of the apertures 81 and these tongues will have thesame function with respect to the bracket arms 32 as the correspondingparts. of the chandelier already described.

I claim as my invention:

1. In a lighting fixture, in combination, a chambered body having anaxially facing. fiat annular supporting. surface apertured at intervalsabout the same, a plurality of tubular bracket arms each having athreaded and longitudinally slotted inner end entering the chamber ofthe body through one of the'said apertures, ashoulder formed on eachbracket arm bearing on the said flat annular surface of the body aboutthe corresponding aperture, an apertured plate coentensive with the saidflatannular surface of the body located within the chamber of the bodywith its apertures receiving the inwardly projecting ends of the bracketarms, a tongue formed integral with the said apertured plate at themargin of each of its apertures entering the slot of the correspondingbracket arm, and a'clamping nut applied to the threaded end `of eachbracket arm withinv the vchan'lber of the body beyond the said plate.

2. In a lighting fixture, in combination, a bracket arm having athreaded inner end formed with a laterally opening socket and a shoulderat the base of the thread, a chambered fixture body having an aperturein its wall to rece-ive the said threaded inner end of the bracket arm,a reenforcing plate lying against the said wall of the fixture body uponthe inside of the same, a tongue carried by the last mentioned plateentering the said laterally opening socket of the bracket arm, and aclamping nut. applied to the threaded end of the bracket arm with: inthe chamber of the fixture body beyonfg the said plate.

3. In a chandelier, in combination, a pendant central supporting spindlethreaded at its lower end, a base plate having a seriesvof apertiuesadjacent its rim, clamping nuts applied to the threaded lowen end of thesaid spindle gripping the base plate between them, means preventingrelative rotation of the base plate and the upper one of the twoclamping nuts, a chambered shell having a flat apertured marginalportion resting on the marginal portion of the base plate and a bulgingintermediate portion covering the intermediate portion of the base plateand the adjacent portion of the spindle, a set of bracket arms havingthreaded inner ends entering the apertures of the said marginal portionsof the shell the said threaded ends of the bracket arms under the baseplate.

et. In a chandelier, in combination, a pendant central supportingspindle threaded at its lower end, a base plate having a series otapertures adjacent its rim, clamping nuts applied to the threaded` lowerend of the spindle gripping the base plate be* tween them, meanspreventing` relative rotation ot the base plate and the upper one of thetwo nuts, a chambered shell having a fiat apertured marginal portionresting on the marginal portion of the base plate and a bulgingintermediate portion c0ver-` ing the intermediate portion ot the baseplate and the adjacent portion of the spindle, a set of bracket armshaving threaded and longitudinally slotted inner ends, entering theapertures of the said marginal portions ot the shell and base plate, atongue formed integrali with the base plate at the margin of each ot itsapertures entering` the slot of the corresponding bracket armandclaniping nuts applied to the threaded ends of the bracket arms underthe base plate.

In a chandelier, in combination, a pendant central supporting spindlethreaded at its lower end, a base plate having a ries ot aperturesadjacent its rim, clamping nuts applied to the threaded lower end et thesaid spindle gripping the base plate between them, a chambered shellhaving a itat apertured marginal portion resting Jn the marginal portionot the base plate and bulging intermediate portion covering theintermediate portionA o1 the base plate and the adjacent portion of thespindle, a set ot bracket arms having threaded inner ends entering theapertures of the said marginal portions of' the shell and base plate andciamping nuts applied to said threaded ends ot' the bracket arms underthe base plate.

6. In a lighting fixture, in combination, a support, a bracket armhaving a threaded end entering said support, a retaining nut on said endto hold the parts in place, said threaded end being slotted beyond saidnut, anda projection on said support. entering said slot to preventrotation of the arm.

7. In a lighting fixture, in combination, a support, a bracket armhaving a pipethreaded end entering said support, a re-` taining nut onsaid end to hold the parts in place, said threaded end being slottedbeyond said nut and resilient, and a projection on` said supportentering said slot to prevent rotation of the arm, said projection.being large enough to be gripped by the walls ont said slot when the nutis tightened.

8.111 a lighting `fixture, in combination, a horizontal supportingplate, bracketfarms rising upwardly from said plate and curved outwardto support individual lights, an ornamental shell completely overlyingsaid plate and apertured to permit passage of said bracket arms,enlargements on saidarms contacting the upper surface of the shell, andtaste-ning means below the plate to clamp all the parts securelytogether.

9. ln a lighting xture, in combination, a stamped supporting platehaving aper tures to receive and support bracket arms, and tubularbracket arms received in said apertures, said apertures having stampedirregularities of contour lying in the plane or the plate, and said armshaving registering irregularities to lock the parts against relativerotation.

l0. In a lighting fixture, in con'ibination, a horizontal supportingplate,fbracket arms rising upwardly from said plate and curved outwardto support individual lights, an ornamental shell completelyoverlyingsaid plate and apertured to permit passage ot said bracket arms,enlargements on said arms contacting the upper surface of the shell, andfastening means below the plate to clamp all the parts securelytogether, said arms and plates having registering irregularities oli'contour for preventing turning of the arms with respect `to the plate.

HENRY A.. FRAMBURG. i I

